| 1 | Wagner Energy LLC | Enid, OK 73701 | Oil Operator | May 2026 |
| 2 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 3 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Sep 2026 |
| 4 | Walsh, F H Jr. Operating Co. Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2019 |
| 5 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 6 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 7 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 8 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 9 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 10 | Williams Prod. Gulf Coast, L.P. | Benbrook, TX 76126 | Oil & Gas Operator | Jan 2012 |
| 11 | Willowbend Investments, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Sep 2026 |
| 12 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 13 | Wolsey Well Service, L.P. | Bowie, TX 76230 | Oil & Gas Operator | Jun 2014 |
| 14 | WPX Energy Gulf Coast, LP | Benbrook, TX 76126 | Oil & Gas Operator | May 2012 |